SiONx 涂层通过核红色素因子调节中细胞干细胞抗氧化能力 2 在有毒氧化应激条件下的活性
Neelam Ahuja1, Kamal Awad1,2, Su Yang3
1Bone-Muscle Research Center, College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, TX 76010, USA.
Antioxidants (Basel, Switzerland)
|February 24, 2024
概括
无形氧化 (SiONx) 涂层减少细菌生长,促进骨愈合. 调整与氧的比率可以改善骨质生成和抗氧化NRF2活性,即使在氧化压力下.
科学领域:
- 生物材料科学 生物材料科学
- 再生医学是一种再生医学.
- 整形外科手术 整形外科手术
背景情况:
- 骨缺陷愈合通常由于植入物生物活性低下,感染和氧化应激会延迟.
- 目前的固定装置缺乏足够的生物活性和抗菌性质.
- 氧化应激阻碍了细胞活动,这对骨再生至关重要.
研究的目的:
- 研究用于骨固定装置的无形氧化 (SiONx) 涂层.
- 评估SiONx中不同N/O比率对生物活性和细菌静止性质的影响.
- 评估NRF2通路在氧化应激下SiONx介导的抗氧化作用中的作用.
主要方法:
- 在体外研究中,使用人间介质干细胞 (MSC) 和耐甲金色葡萄球菌 (MRSA).
- 评估不同SiONx N/O比率的骨质生标志物 (ALP,骨质卡尔,RUNX2,奥斯特里克斯).
- 在有毒氧化应激条件下的细胞活力和抗氧化剂反应的评估.
- 为了阐明抗氧化机制,NRF2基因沉默 (NRF2-KD).
主要成果:
- 与裸体相比,SiONx涂层显示MRSA生长率下降了4倍以上.
- 在正常情况下,SiONx中增加的N/O比率增强了骨质生标志物表达 (ALP的1.5倍,其他标志物的2倍).
- 在氧化应激下,SiONx改善了MSC活力和骨质原生标志物表达.
- NRF2通路的激活对于SiONx介导的抗氧化作用至关重要.
结论:
- 氧化涂层对MRSA具有显著的细菌静止特性.
- 这些涂层促进骨质生成,并通过NRF2通路增强细胞抗氧化防御,特别是在氧化应激下.
- 在具有氧化应激作用的具有挑战性的临床场景中,SiONx有可能改善骨再生.
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